Belt loop sewing machine



Aug. 23, 1949. J. GALKIN 2,480,012

BELT LOOP SEWING MACHINE Filed Feb. 15, 1948 e sheets-sheet 1 Allg. 23, GALKIN BELT LOOE SEWING MACHINE 6 Sheets-Sheet 2 Filed F'eb. 13, 1948 INVENTOR BW Mu ATTORNEY Aug. 23, 1949.

Filed Feb. 15, 1948 J. GALKIN BELT LOOP SEWING MACHINE 6 Shets-Sheet 3 uw L@ l 4 4s dill" 4B I 2 iii nl II." l J il' ii 49 51 JOSEPH GALKIN INVENTOR BMM ATTORNEY Aug- 23, 1949. J. GALKIN 2,480,012

BELT LOOP SEWING MACHINE Filed Feb. 15, 1948 6 Sheets-Sheet 4 JosriPl-ll GALKIN y INVENTOR ATTORNEY Aug. 23, 1949. J. GALKIN 2,480,012

BELT LOOP SEWING MACHINE Filed Feb. 15, 1948 6 Sheets-Sheet 5 '05/ @X33 i Q//' y f6l 1 fb 40 40' f@ s 35 l l 38 12 I mnu uuml :i msm V 'L-#Kl Y 7X? `36,/ /M' D @l T JOSEPH GALKIN d INVENTOR 'I BM ATTRNEY Aug. 23, 1949. J. GALKIN 2,480,012

BELT LOOP SEWING MACHINE Filed Feb. 13, 1948 6 Sheets-Sheet 6 FIGB f2 79 um .Y 32 Ilm @Z v 3 :zal

no a1 FIGB JOSEPH sALKnN INVENTOR ATTORNEY Patented Aug. 23, 1949 UNITED. STATES PATENTV OFFICE Y l p Y 2,480,012 i naar Lo or* snwnsicfl Miriam-NE `osephl Gal-kin, New' York, N. Y. application February 13, 1948; Serial No. 8,100`

8? Claims'.

This invention relates to improvements in' cup i'eed` sewing machines whereby belt loops are automatically produced ina single continuous operation by mechanism comprising two blades movable lengthwise" of the lineo feed` which cut an untrimm'ed section of fabric into strip-form; then forrnsa ridge in the middle ofthe strip and upfolds both edges of the strip, the" mechanism being adapted to automatically" and simultaneously top feed the untrimme-d section of fabric and the trimmed strip of fabric with a four-mm tion` feeding mechanism while the strip is flat and then continues to feedtl'ie strip of fabric' when ridged end upfolded and their feeds the' folded loop while-being overedge stitched.

In my prior Patent No. 22623547', I have dis'- closed mechanism forv producingibelt loops hav'- ing edge portions in abutting" relation `and stitched by two spaced' needle'swhich caused' two threads to pass through'andl be visible on'the'up'- per and lower surfacesof thebelt' loops. i

An object of this invention is to providemech-V anism for producing belt loops fro'rri an uriw trimmed' section of fabric or from scrap material, and in which the stitching is not visible' onv the normally exposed surface of the fabric and which is produced automatically in a singlecontinu'ous operation yby top-feeding, trimming lengthwise' of the line of feed, upfolding, andv overedge stitching operation.

Another object of this invention is to provide a work supporting` base of' a size adaptedE to support a large section of untrimmed fabric andi-having an upper surface level with a stationary blade to facilitate handling of large sections of fabric to be cut into pre-determined width, the base having a chutethrough which the chips move downwardly fromj the base, whereby continuedA belt' loop making operationv is possible with overedge stitching at high speed; A

Another object of this invention is to' provide a fabric guide to accurately spa-ce one edge of the section of fabric in relation tothe cutting blades to trim a minimum of fabricat oneedge thereof;

With the above and other objects'in view, the invention willbe hereinafter more particularly described, andthe combination and'arrangem'ent of parts will be shownl in the accompanying drawings and pointed out in the claims which form part of this specification.

Reference will now' be hadvv to the drawings,` wherein like numerals offreferencedesignate cor"- responding parts throughout the several views,- in which: v

Figure 1 is a top plan view of a cup feedA overseaming machine', showing my invention applied thereto; j

Figurez is a' front'elevati'on of the sewing nia'- chine showniniligiire' 11 y Y f Figure 3" isV an endT View' of the machine shown inFiguresi'and 2. i 1 Vf i 1 i Figure' 4 is a top plan View' of a fra'enientaji portion of the four-motion top" feedfidog and the duplex trimming mechanism, the feedE dog actuating' mechanism being removed; l

Figure 5" is a front View of the" mechanism shown in Figure 4, above' the work supporting base: t

Figure 6 is a top plan View similarv tothat shown in Figure 4; with the" top feedadog re'- movedto show the'stationaryblade. f

Figure' 'lf isav cross-sectional view taken onA the line 1LT in Figure 6; A

Figure 8" is a' cross-sectional view" tallienl on line Bef-811mn 'Figure 4"; a portion' of the' housing for the feed-'dog' being shown andthe feed-dog` ao#- tuating mechanism being omitted. u i

Figure 94 is a; View showing' the formation of a blini:l s'titch'ed"be1t` loop; O n an enlarged scale; Figure 1 :0 is a cross-"sectional view taken on linei I BL I Il in Figure l.

In theilliistrated embodiment of the invention, the'niiineral I @indicates thwork support'- ing base of a sewing machineembodyin'g my in ven'tio'n and' whichcomprises a" casing II, two cuplshaped feedingdlsks'l?, I 2, a horizontal needle I3,-a10oper f4?, and ade-nectar |5 forctn needle aridq l'cloplA t'llead 160135;` A` Stitch" fin'gei is shown atI6. A plate having the needlegil'iding groovel isshow at II, a' needle threadl guide is' showh at y|8 aridfai` 10o'p`e`r` thread guide at 1'9", asis'known iirtlieait This invention is particularly directed toL a duplex' automatici feeding and `t'riiiming mechanismfrz. The automatic feeding mechanism comprises avcombined fouremotion topfe'e'dldog 26 having aforwardfrectanglulai' stripVw feeding portion 1W, an' intermediate triangular convergingly: feeding p'c'rtic'in'A 281 and a biiuir'catedlrear portion rez l The topfV feed-'dbg ze hasA feeding teeth' 3'04 exileritlihi-t all-along' the length; thereof on its lower surface: The feeding'mechanisinis designed -tolfedallarge` section of fabric or l s'cr'ap materialto" and* through a duplex trimming mechanism; through a convergingly folding: secli tio-n1 311,past a centrar fm1 a2` between the; ti-1 fllltd'iri feeding portion 29 and`-v tithel cupe" shaped feeding-fdisksiz: A t

duplex automatic" trimming mechanism y comprsesfa stationary blade 3B having a here` tthroug'b the `edges ibi both;V side 'portions oft yfzoutabreetangulai' upper surface'l and two eutfabric and throughtl ll The earreret LA if; are keyed to, the shaft azsby.

he central fisci'tiodfj; dow

ting edges 38,"1in thekpdesired spaced-apart Strip folded over thelifm;32.,.y t M .y cutting relation; y topfeed-"dbg 26` sannprightlcentralWall 'The movable yShear blades 40, #were support- 11;, 69.1%. The `front `ptclrtiori.if trie feeddog has a ed by blade carriers M.` The movablebladeea guide; s101264 witlixparallel upright Walls. rier `are slidablykmounted onta rocli-shaft 42. Asshownbin Fignre 3, a` crankxGZis ecured to l fa rockfshaft freelgQW-er` ijid of tige crank a key 43, and are resiiientlybressediby co'ilspringej 5";62Vis operativel 'postionedin -thefguideelot EL. f Min thedirection ci.{thestaticnary-euttinggedges 110 The hat 63 ismotatably mountedfnzabeaiing mined width.

.stameny vertical movementstbytnenamersm, y t y All. The carriers slidablyengagfsthe elbngate'd moved' iorwartlgyand brating-cftnectitigrodfdl:operated b anfaifni 49 has anarm 5| fixed thereto." The free eiidbf ,the feed-dgf.Ly

lkey 43.', The `key is heldin "fixed paraueiqieiatioit 4t2` and tigtmugnthe` rwith tnemcklshaft izlby being heid in an ar `laffixed.tb the shaftjAZaf 1 t aiie is; pivotal y onfaiock-shaft' 419.*lie noclshaft @Sect "'tes .j the movable `sheen; bladed, @"bnee fer each f j 1s horizontally posittonedbelow" "in snpportng re'volntien et themainlshaft SugQlThe flock-shaft L relation witte/1a pinffll extendingitransverselyof the arm 5l pivotally conhectedto a ball-jointed f` Fixed .tothe busliling l|]`(Figures 1 aridlO) vibrating connecting rod 752, the. upper end bf 30a lever' 73 having its free( end `I4` belowythe free g Whichis suitably actuated by an eccenti'c 53,;'on end portion .of a lever '15 which isgfulcriimed On'a i the main shaft 59.. Theshaft dS is thus rocked pin 'IiiI Theilleverl is connected at one endfwto the fonver'gtngsiee.waneer Vtne',unten"redet tra angular portion 218 ofjtiie yfeedfdoe; @if -Wl'ien the trimmed. strip'iabric yjpasisesy the, @emerging fahne temiciupvieigdly `diie te 'Ghewnsintly @0n- "strictng passagewaybetween the said alle 5a ai@ sideways mevablteider ngemberisfae nay.

ing `upright inner walls which arepkositioned pa Tnet Sidewaye f m able. folder members V59'1coactwith.the bifureatediear .K 4\l{portici}i.of the feeddog 11o-retain the Ufsliape et iy folded `faerie and` te blindtitcnthe middle of ai@` by theeccentric 53 on tbe main shaft En, 'y a connecting rod Tl whichfis actuatedugby an e- 'As shown in Figure lgtheretare providedkftwo f centric 53aenthe :pain siaft 50.

folding. membersf vsgiiichf` are secnied` teuthe f 0 IUgWill thus betheeei; t "fat thetjfeeddog 263e- Wer'ksqpportingtase lgzgby sciewstea .".rhefoictly Ceivests iwf mbtions forward backbfardand ing members 55, comprise y eonvergingluright upexld doiynftomtbe main shaft SDQ walls lwhioh are in cleeelycspaeed relatie lfrom Slodwmin Figuresand Ski-thee ff rear portiontZ of 'the feed-dog 26, the utionvegirig upa d right walls V5l canse thesideedge portions qt theI enemy securedt( the walls. 5 1 baisent `si@ ries 1161 g with the enter faces ,oft the bifnrcated rea `3?.asltdetzfmined by fqrwar'dly of the movable'shea blades 40,40 feeds thelfabrcto andtbtougli the movableehear `form.

shaped faerie '1itwftreliei` m'eabserjt t and-looper-tlireade to coyer theteide edges eitliey crimped looplto thE U-shabediabric. o 1 the"statioi'laryfblade` 3B. The Support 8,8 cornf-y Figu-,re QiSLanenlawrged vsealediagfrarr1"fshoyryin pfrise'sI aybloclg tofgwhichfthe blade 36 ris fas-j` the formation'of a blind stitchedy belt 1oop,`the (0 tened. K .n bite ofthe needle l3into the fabri being .regu-jy vBy adjnstingga screw 9D in tbe siippprttaait lated by pivoting the rear portion o the central y `is y"possibletb raise orY-lower the bladef to bring fin 32. The n 312` is finely adjustable `vertically its upper surface level with thefwork supporting to and fromtheneedle i3 lio-enable the bitewof .base lafterthe blade is glundfg rthe needle to .beYvariedl` The needle passes 15` ,L The".overseamingzeewing machine herewith) sii-own is qf the 'type snows in Patentfmimter facette cated misuse 14,197', and ned's' 1 1@ further description.-

In accordance with" tirepateritstatutes have describe-d and illustrated the preferred embodiiifi'e'nt of my invention, but itv will bev understood that various changes and`V modifications can be made therein without departing from the' spirit of the" invention as' defined by the appended claims.

I` claim: M n

i. Ina cup feed overseamirrg machine, duplex automatic feeding and trimming' me'charusm for producing beit loops of the class describe-d 'in a continuous automatic operation, comprising a WIK SIIpItg bais f a Sli@V dipftd t Slip port a` Section of'4 uItifi-rilrdfabiic, al stationary blade having a horizontal rectangular' upper` sur'- face and two cutting edges in spaced-apart strip cutting relation, said stationary blade beifg fixed to said worl; supporting base with its upper surface level with the upper surfaceA of said base, two vertically reciprocable blades movable lengthwise of the line of' feed and coacting simultaneously with said stationary blade to sever said section of fabric along parallel edges, a combined four-motion top feed-dog having a rectangular full-width, strip feeding Aportion and a triangular convergingly feeding and folding portion for automatically feeding a horizontal flat un'trimmed fabric section into vertically folded loopform, and two folding 4members having converging upright `walls xed to said base on opposite sides of 'said converging feeding portion of said top feed-dog and coacting with saidV converging walls in folding said strip into loop form and feeding said loop to Al-shaped loop forming mechanism and toa pair of feeding cups.

2. In an overseaming machine having two feeding cups, duplex automatic feeding and trimming mechanism for 4producing belt loops of the class described in a continuous automatic operation, comprising a work supporting base adapted'to support a section of untrimmed" fabric, a stationary blade having a horizontal upper surface and two cutting edges in spaced-apart strip cutting relation, said' stationary blade beingV fixed to saidv work supporting base with its' upper' surface at the upper surface of said base, twove'rtically reciprocable blades movable lengthwise. of! the lin-e of feed and' coacti'ng with said stationary blade to simultaneously she-ara section? of fabric along parallel edges, a combined four-motion t'op feed-dog having a rectangular full-width strip feeding portion and a triangular convergingly 1 feeding and folding portion for automatically feeding a horizontal flat untrimmed fabric section into vertically folded form, and two folding members having converging upright walls fixed to said base on opposite sides of said converging feeding portion of said top feed-dog and coacting with said converging feed-dog walls in folding said strip into loop form and automatically feeding said loop to said feeding cups.

3. In an overseaming machine having two feeding cups, duplex automatic feeding and trimming mechanism for producing belt loops of the class described in a continuous automatic operation, comprising a work supporting base adapted to support a section of untrimmed fabric, a stationary blade having a horizontal upper surface and two cutting edges in spaced-apart strip cutting relation, said stationary blade being fixed to said work supporting base with its upper surface at the upper surface of said base, two vertically reciprceabie transmet/able' Iengtfiwise of* tile line' of feed and coactin-g with said stationary blade to'simultaneously slreara section of fabne alongk paranei edgesa combined four-motion top-reec-iognaving a forward rectangular strip feeding` portion `and a rear triangular convergingly feeding portion for automatically' feeding a horizontal flat untrimmed `fabric section into vertically folded form, and tw'o folding members having converging upright walls fixed t'o said base' on' opposite sidesvnof said converging' feeding portion of saidtop feed-dog and coacting with sain converging feed-dog' walls in folding said stripinfo loop form and automatically feeding said loop to said feeding cups. Y

l i4? Inl an overseaming machine having two feedcups,y duplex automaticfeeding and trimming meclianism for producing. belt loops in a continuous automatic` operation and whereinthe stitching is not visible on the normally erpos'ed surface of the fabric,A comprising a work supporting base adapted to `support a section .off untrimmed fabric, a combined four-motion top feeddoghaving ay forward rectangular strip feeding portion; an intermediate triangular convergingly feeding portion and a bifurcated rear portion -for automatically feeding `a horizontal flat untrimnfledV fabricsection into vertically folded form, a stationary blade having a horizontal upper surface and two cutting edges in spaced-apart stripY cuttingrelation,r said stationary blade being fixed to said work supporting base with its upper surface atthe upper surface of said base, two vertically reciprocablebladesmovable lengthwise` of the line of feed and coacting with said stationary bladetoA simultaneously shear a section of fabric along parallel edges, and two folding members having converging y. upright Walls fixed to said baseon opposite sides of said converging feeding portion of said top feed-dog and coacting with said converging feed-dog walls in folding saidstri-pgandfour-motion mechanism for said feed-dog for automatically feeding said folded stripto said feeding cups.

5. In anoverseamin-g machine havin-g two feeding cups,` automatic feeding and duplex trimming mechanism for producing belt loops in a continuous automatic operation, comprising a work supporting base adapted to support a section of untrimmed fabric, a combined four-motiontopcfeed-dog havinga forward rectangular strip feeding-portion, an intermediate triangular convergilngly feeding portion anda bifurcated rear portion for automatically feeding a horizontal flat fabric section into vertically folded form, a stationary blade having a horizontal rectangular upper surface and two cutting edges in spaced-apart strip cutting relation, said stationary blade being xed to said work supporting base with its upper surface at the upper surface of said base, two vertically reciprocable blades movable lengthwise of the line of feed and coacting with said stationary blade to simultaneously shear a section of fabric along parallel edges, and two folding members having converging upright walls fixed to said base on opposite sides of said converging feeding portion of said top feed-dog and coacting with said converging feed-dog walls in vertically folding said strip, an upright tongue positioned intermediate said folding members, and four-motion feeding mechanism for said feed-dog for automatically feeding said fabric to said feeding cups.

6. In an overseaming machine having two feeding cups, automatic top feeding and duplex sesame trimming :mechanism for producing belt loops ai'continuous automatic operation, comprisinga work supporting rbase `adapted, to supporta sec- ,f

tion of untrimmed fabric, a cmbinedfouremoe t'ionftop feed-dog' having a forwardrectangular strip` feeding portion, an,intermediatetriangular convergingly feeding` portion and a bifurcatedy l rear portion for automaticallyffeeding a horizontal nat fabric section "intoverticaliy folded form,

astationary bladeV having a horizontal rectangu` lar upper surfacel and ltwo cutting "edges in,L

spaced-apart strip cutting relation, `said ksta-- tionary blade beingxed to said Work suDpOrting base with its uppersurface at the upper surface of said base,l twolverticallyreciprocable bladesy movable lengthwise of the line of feed, analcoan upright `tongue positioned intermediate 4said foldingmembers, and four-motion feedingmech'A Y i anism` forsaid feed-dogior automatically feeding said fabric to andzthroughsaid duplex trimminginechanism and to said feeding cups K 7, `In an overseaming machine `having two :feeding cupaautomatic top feeding and duplex trimming mechanism for producing `belt loops in `,a continuous automatic operationfrom, any ununtriinmed iabrica combined four-motion `top y feed-dogk having a'forward rectangular, strip.

four-motion feeding "mechanism for said ,-jeedfV o, f dogfor automatically 4feeding said `fabric to and through said duplex trimmingland yfolding mechi i anismiand to saidy feeding'cups. f

^ 8. In;a,blindstitch'overseamingrnachine,have ,f inga mainshaft and two feeding cups having saw shapedteeth, automaticiop feeding and due plexjtrimming mechanism for` producing @belt loops in a continuous automatic operation from i n an untrimmed fabric section', comprising a Work `supporting base adapted to support a section of feedingI portion, andntermediatetriangular rconvergingly feeding portion and: a bifurcatedreary portion", a stationarypblade'having a horizontal rectangulan upper surface andltwo cutting *edges `inr spaced-apartr strip' cutting relation, said stae o tionaryfblade being xedto said work support ing base withy said `cutting edges positioned at the upper surface of tsaid base, two` vertically re`` ciprocable blades movablelengthwise of the line i of` feed and coacting withv said stationary blades l to simultaneouslysheara sectionof fabric along two parallel edges, and .two foldingmembers yhaving converging upright walls fixed to `said base u on opposite sides of said,converging'feeding por` `tion of `said top `feecbdog and coacting with said convergngfeed-dog walls nivertically folding trimmed fabric ,section," comprising a Work sup= porting basev adapted to 'supporta section of untrimi'nedr fabric, a combined four-motion ton said strip, an upright .tonguepositioned interrnediate saidxbifurcated rear feed-dog portion for crimping said foldedmstrip and four-motion feedi ingy mechanism for said feedfdog for automaticallvfeedng; said fabricto ,and through lsaid feeddog having `,a forward rectangular strip feeding-portion, an "intermediate triangular'conf verginglyfeedingportion anda bifurcated rear i portion, a stationary bladehaving a horizontal rectangular upper surface and `two cutting edges in spaced-apart strip cutting relation, said sta-y i, tionary blade being fixed` to said Work supportduplex` trimming and folding y mechanism and to,` o l said f-eedingcups, said lfeeding mechanism being actuated from` said main shaft.`

ing base vwith i said cutting .edges positioned at Vthe'upper surfaceof said base,"two vertically reciprocable blades movable lengthwise .of theY line, of feed yand coacting` with said stationary blade to simultaneously shear. a section of fabric along two parallel edges,` and two folding* members having converging upright walls xed to said base on opposite sides of said convergingfeeding portion of said top feed-dogand coactingavith said converging feedfdog'walls in vertically'foldingr said strip, an upright tongue positioned'.interme-` diate said bifurcated rear feed-,dog portion `and o o, 7 REFERENCES errno u The following refererniesl lewof thisv patenti K m UNITEDSTATES manoirs f g y "Date uosEPH canins.v

are of ,record in the 

